package Demo1;

import java.util.ArrayList;
import java.util.Stack;

public class Solution {
    public boolean IsPopOrder(int [] pushA,int [] popA) {
        Stack<Integer> stack = new Stack<>();

        int j = 0;
        for(int i = 0; i < pushA.length; i++){
            stack.push(pushA[i]);

            while (!stack.empty() && stack.peek() == popA[j]){
                j++;
                stack.pop();
            }
        }

        return stack.empty();
    }
}
